package com.wingsoft.system.service.impl;

import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.github.yulichang.query.MPJLambdaQueryWrapper;
import com.github.yulichang.wrapper.MPJLambdaWrapper;
import com.wingsoft.common.annotation.DataScope;
import com.wingsoft.common.constant.UserConstants;
import com.wingsoft.common.core.domain.TreeSelect;
import com.wingsoft.common.core.domain.entity.SysDept;
import com.wingsoft.common.core.domain.entity.SysRole;
import com.wingsoft.common.core.domain.entity.SysUser;
import com.wingsoft.common.core.text.Convert;
import com.wingsoft.common.exception.ServiceException;
import com.wingsoft.common.utils.DataScopUtils;
import com.wingsoft.common.utils.IdGenerator.IdGeneratorFactory;
import com.wingsoft.common.utils.SecurityUtils;
import com.wingsoft.common.utils.StringUtils;
import com.wingsoft.common.utils.spring.SpringUtils;
import com.wingsoft.system.mapper.SysDeptMapper;
import com.wingsoft.system.mapper.SysRoleMapper;
import com.wingsoft.system.service.ISysDeptService;
import org.apache.commons.lang3.ObjectUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.*;
import java.util.stream.Collectors;

/**
 * 部门管理 服务实现
 * 
 * @author ruoyi
 */
@Service
public class SysDeptServiceImpl extends ServiceImpl<SysDeptMapper,SysDept> implements  ISysDeptService
{
    @Autowired
    private SysDeptMapper deptMapper;

    @Autowired
    private SysRoleMapper roleMapper;
    @Resource
    private IdGeneratorFactory idGeneratorFactory;

    /**
     * 查询部门管理数据
     * 
     * @param dept 部门信息
     * @return 部门信息集合
     */
    @Override
    //@DataScope(deptAlias = "d")
    public List<SysDept> selectDeptList(SysDept dept)
    {
        MPJLambdaWrapper<SysDept> wrapper = new MPJLambdaWrapper<>();
        wrapper.eq(SysDept::getDelFlag, "0");
        wrapper.eq(!ObjectUtils.isEmpty(dept.getDeptId()), SysDept::getDeptId, dept.getDeptId());
        wrapper.eq(!ObjectUtils.isEmpty(dept.getParentId()), SysDept::getParentId, dept.getParentId());
        wrapper.like(!ObjectUtils.isEmpty(dept.getDeptName()), SysDept::getDeptName, dept.getDeptName());
        wrapper.eq(!ObjectUtils.isEmpty(dept.getStatus()), SysDept::getStatus, dept.getStatus());
        wrapper.orderByAsc(SysDept::getParentId).orderByAsc(SysDept::getOrderNum);
        DataScopUtils.applyScopeOr(wrapper, "dept_id",null);
        return deptMapper.selectList(wrapper);
    }

    /**
     * 查询部门树结构信息
     * 
     * @param dept 部门信息
     * @return 部门树信息集合
     */
    @Override
    public List<TreeSelect> selectDeptTreeList(SysDept dept)
    {
        List<SysDept> depts = SpringUtils.getAopProxy(this).selectDeptList(dept);
        return buildDeptTreeSelect(depts);
    }

    /**
     * 构建前端所需要树结构
     * 
     * @param depts 部门列表
     * @return 树结构列表
     */
    @Override
    public List<SysDept> buildDeptTree(List<SysDept> depts)
    {
        List<SysDept> returnList = new ArrayList<SysDept>();
        List<Long> tempList = depts.stream().map(SysDept::getDeptId).collect(Collectors.toList());
        for (SysDept dept : depts)
        {
            // 如果是顶级节点, 遍历该父节点的所有子节点
            if (!tempList.contains(dept.getParentId()))
            {
                recursionFn(depts, dept);
                returnList.add(dept);
            }
        }
        if (returnList.isEmpty())
        {
            returnList = depts;
        }
        return returnList;
    }

    /**
     * 构建前端所需要下拉树结构
     * 
     * @param depts 部门列表
     * @return 下拉树结构列表
     */
    @Override
    public List<TreeSelect> buildDeptTreeSelect(List<SysDept> depts)
    {
        List<SysDept> deptTrees = buildDeptTree(depts);
        return deptTrees.stream().map(TreeSelect::new).collect(Collectors.toList());
    }

    /**
     * 根据角色ID查询部门树信息
     * 
     * @param roleId 角色ID
     * @return 选中部门列表
     */
    @Override
    public List<Long> selectDeptListByRoleId(Long roleId)
    {
        SysRole role = roleMapper.selectRoleById(roleId);
        return deptMapper.selectDeptListByRoleId(roleId, role.getDeptCheckStrictly());
    }

    /**
     * 根据部门ID查询信息
     * 
     * @param deptId 部门ID
     * @return 部门信息
     */
    @Override
    public SysDept selectDeptById(Long deptId)
    {
        /*
        MPJLambdaWrapper<SysDept> mpjLambdaWrapper = new MPJLambdaWrapper<SysDept>()
                .select("t.dept_id","t.dept_name","t.parent_id","t.order_num","t.status","t.leader","t.phone","t.email","t.ancestors")
                .selectAs(SysDept::getDeptName, "parentName")
                .leftJoin(SysDept.class,"pd",SysDept::getParentId,"t", SysDept::getDeptId)
                .eq("t",SysDept::getDeptId, deptId);
        return deptMapper.selectJoinOne(SysDept.class,mpjLambdaWrapper);
        */
        SysDept sysDept = this.getOne(Wrappers.<SysDept>lambdaQuery().eq(SysDept::getDeptId, deptId));
        if(Objects.nonNull(sysDept)){
            Long parentId = sysDept.getParentId();
            sysDept.setParentId(parentId);
            if(Objects.nonNull(parentId)){
                SysDept parentDept = this.getOne(Wrappers.<SysDept>lambdaQuery().eq(SysDept::getDeptId, parentId));
                if(Objects.nonNull(parentDept)){
                    sysDept.setParentName(parentDept.getDeptName());
                }
            }
        }
        return sysDept;
    }

    /**
     * 根据ID查询所有子部门（正常状态）
     *
     * @param deptId 部门ID
     * @return 子部门数
     */
    @Override
    public Long selectNormalChildrenDeptById(Long deptId)
    {
        Long count = Long.valueOf(deptMapper.selectCount(
                new MPJLambdaWrapper<SysDept>()
                        .eq(SysDept::getStatus, 0)
                        .eq(SysDept::getDelFlag, "0")
//                        .apply("find_in_set({0}, ancestors)", deptId) // 自定义 SQL 片段
                        .like(SysDept::getAncestors, "," + deptId + ",")
        ));
        return count;
    }

    /**
     * 是否存在子节点
     * 
     * @param deptId 部门ID
     * @return 结果
     */
    @Override
    public boolean hasChildByDeptId(Long deptId)
    {
        int result = deptMapper.hasChildByDeptId(deptId);
        return result > 0;
    }

    /**
     * 查询部门是否存在用户
     * 
     * @param deptId 部门ID
     * @return 结果 true 存在 false 不存在
     */
    @Override
    public boolean checkDeptExistUser(Long deptId)
    {
        int result = deptMapper.checkDeptExistUser(deptId);
        return result > 0;
    }

    /**
     * 校验部门名称是否唯一
     * 
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    public boolean checkDeptNameUnique(SysDept dept)
    {
        Long deptId = StringUtils.isNull(dept.getDeptId()) ? -1L : dept.getDeptId();

        MPJLambdaWrapper<SysDept> mpjLambdaWrapper = new MPJLambdaWrapper<>();
        mpjLambdaWrapper.eq(SysDept::getDeptName, dept.getDeptName());
        mpjLambdaWrapper.eq(SysDept::getParentId, dept.getParentId());
        mpjLambdaWrapper.eq(SysDept::getDelFlag, "0");
        SysDept info = deptMapper.selectOne(mpjLambdaWrapper);
       // SysDept info = deptMapper.checkDeptNameUnique(dept.getDeptName(), dept.getParentId());
        if (StringUtils.isNotNull(info) && info.getDeptId().longValue() != deptId.longValue())
        {
            return UserConstants.NOT_UNIQUE;
        }
        return UserConstants.UNIQUE;
    }

    /**
     * 校验部门是否有数据权限
     * 
     * @param deptId 部门id
     */
    @Override
    public void checkDeptDataScope(Long deptId)
    {
        if (!SysUser.isAdmin(SecurityUtils.getUserId()) && StringUtils.isNotNull(deptId))
        {
            SysDept dept = new SysDept();
            dept.setDeptId(deptId);
            List<SysDept> depts = SpringUtils.getAopProxy(this).selectDeptList(dept);
            if (StringUtils.isEmpty(depts))
            {
                throw new ServiceException("没有权限访问部门数据！");
            }
        }
    }

    /**
     * 新增保存部门信息
     * 
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    public int insertDept(SysDept dept) {

        SysDept sysDept = new SysDept();

        BeanUtils.copyProperties(dept, sysDept);
        sysDept.setDeptId(idGeneratorFactory.getId(SysDept.class));
        if (Objects.nonNull(dept.getParentId())) {
            SysDept info = deptMapper.selectDeptById(dept.getParentId());
            if (Objects.nonNull(info)) {
                // 如果父节点不为正常状态,则不允许新增子节点
                if (!UserConstants.DEPT_NORMAL.equals(info.getStatus())) {
                    throw new ServiceException("部门停用，不允许新增");
                }
                if (StringUtils.isNotBlank(info.getAncestors())) {
                    sysDept.setAncestors(info.getAncestors() + dept.getParentId() + ",");
                } else {
                    sysDept.setAncestors("," + info.getDeptId() + ",");
                }
            }
        }
        if(StringUtils.isBlank(sysDept.getDelFlag())){
            sysDept.setDelFlag("0");
        }
        sysDept.setCreateTime(new Date());
        return deptMapper.insert(sysDept);
    }

    /**
     * 修改保存部门信息
     * 
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    public int updateDept(SysDept dept)
    {
        SysDept newParentDept = deptMapper.selectDeptById(dept.getParentId());
        SysDept oldDept = deptMapper.selectDeptById(dept.getDeptId());
        if (StringUtils.isNotNull(newParentDept) && StringUtils.isNotNull(oldDept))
        {
            String newAncestors ;
            if (StringUtils.isNotBlank(newParentDept.getAncestors())) {
                newAncestors = newParentDept.getAncestors() + dept.getParentId() + ",";
            } else {
                newAncestors = "," + newParentDept.getDeptId() + ",";
            }
            String oldAncestors = oldDept.getAncestors();
            dept.setAncestors(newAncestors);
            updateDeptChildren(dept.getDeptId(), newAncestors, oldAncestors);
        }
        dept.setUpdateTime(new Date());
        int result = deptMapper.updateDept(dept);
        if (UserConstants.DEPT_NORMAL.equals(dept.getStatus()) && StringUtils.isNotEmpty(dept.getAncestors())
                && !StringUtils.equals("0", dept.getAncestors()))
        {
            // 如果该部门是启用状态，则启用该部门的所有上级部门
            updateParentDeptStatusNormal(dept);
        }
        return result;
    }

    /**
     * 修改该部门的父级部门状态
     * 
     * @param dept 当前部门
     */
    private void updateParentDeptStatusNormal(SysDept dept)
    {
        String ancestors = dept.getAncestors();
        if(ancestors.startsWith(",")){
            ancestors = ancestors.substring(1);
        }
        Long[] deptIds = Convert.toLongArray(ancestors);
        deptMapper.updateDeptStatusNormal(deptIds);
    }

    /**
     * 修改子元素关系
     * 
     * @param deptId 被修改的部门ID
     * @param newAncestors 新的父ID集合
     * @param oldAncestors 旧的父ID集合
     */
    public void updateDeptChildren(Long deptId, String newAncestors, String oldAncestors)
    {
//        List<SysDept> children = deptMapper.selectChildrenDeptById(deptId);
        List<SysDept> children = this.selectChildrenDeptById(deptId);

        for (SysDept child : children)
        {
            child.setAncestors(child.getAncestors().replaceFirst(oldAncestors, newAncestors));
        }
        if (children.size() > 0)
        {
            deptMapper.updateDeptChildren(children);
        }
    }


    /**
     * 删除部门管理信息
     * 
     * @param deptId 部门ID
     * @return 结果
     */
    @Override
    public int deleteDeptById(Long deptId)
    {
        return deptMapper.deleteDeptById(deptId);
    }

    /**
     * 递归列表
     */
    private void recursionFn(List<SysDept> list, SysDept t)
    {
        // 得到子节点列表
        List<SysDept> childList = getChildList(list, t);
        t.setChildren(childList);
        for (SysDept tChild : childList)
        {
            if (hasChild(list, tChild))
            {
                recursionFn(list, tChild);
            }
        }
    }

    /**
     * 得到子节点列表
     */
    private List<SysDept> getChildList(List<SysDept> list, SysDept t)
    {
        List<SysDept> tlist = new ArrayList<SysDept>();
        Iterator<SysDept> it = list.iterator();
        while (it.hasNext())
        {
            SysDept n = (SysDept) it.next();
            if (StringUtils.isNotNull(n.getParentId()) && n.getParentId().longValue() == t.getDeptId().longValue())
            {
                tlist.add(n);
            }
        }
        return tlist;
    }

    /**
     * 判断是否有子节点
     */
    private boolean hasChild(List<SysDept> list, SysDept t)
    {
        return getChildList(list, t).size() > 0;
    }


    /// xml逻辑改造成java //////////////////////////////////
    private List<SysDept> selectChildrenDeptById(Long deptId) {
        return deptMapper.selectList(Wrappers.<SysDept>lambdaQuery()
                .like(SysDept::getAncestors, "," + deptId + ","));
    }

}
